C++0x add-on library for GCC 4.3

[Chris Fairles]

> As much as fun as it was to write this, I hope to move soon to 4.4, as
> it seems to be very advanced in features!

Hi Pedro. First of all, thank you for sharing. You should check out a
copy of gcc mainline (4.4.0) from svn as it already contains
implementations for many c++0x standard library features. Please feel
free to comment with improvements/suggestions/questions.

Cheers,
Chris